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Correlations of CYP11B2 gene polymorphisms with eclampsia.

A-X Zou1, F-X Zhu, M-X Jiang

  • 1Department of Obstetrics, The Second Children & Women's Healthcare of Jinan City, Jinan, China. 1289768636@qq.com.

European Review for Medical and Pharmacological Sciences
|November 6, 2020
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Summary

Genetic variations in the CYP11B2 gene are linked to eclampsia development. Specific CYP11B2 gene polymorphisms and haplotypes correlate with increased eclampsia risk and severity, impacting blood pressure and protein levels.

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Area of Science:

  • Genetics
  • Obstetrics
  • Molecular Biology

Background:

  • Eclampsia is a severe complication of pregnancy characterized by new-onset hypertension and organ dysfunction.
  • The CYP11B2 gene, encoding aldosterone synthase, plays a role in the renin-angiotensin-aldosterone system, which is implicated in blood pressure regulation.

Purpose of the Study:

  • To investigate the association between specific polymorphisms in the CYP11B2 gene and the risk of developing eclampsia.
  • To explore the correlation of these genetic variations with clinical parameters such as blood pressure, coagulation, and renal function in eclamptic patients.

Main Methods:

  • Genotyping of CYP11B2 gene polymorphisms (rs4543, rs3802228, rs104894072) using polymerase chain reaction (PCR) in 400 pregnant women (200 with eclampsia, 200 controls).
  • Measurement of CYP11B2 gene expression levels.
  • Analysis of associations between genotypes, haplotypes, gene expression, and clinical parameters including blood pressure, coagulation, and renal function indexes.

Main Results:

  • Significant differences in allele and genotype distributions of CYP11B2 rs4543, rs3802228, and rs104894072 were observed between eclampsia and control groups.
  • Specific genotypes (e.g., AA for rs3802228, TG for rs104894072) and haplotypes (CGG, TGT) were more frequent in the eclampsia group.
  • CYP11B2 gene expression was related to rs104894072 polymorphism and was higher in eclamptic patients with the GG genotype.
  • CYP11B2 rs4543 polymorphism correlated with prothrombin time (PT), while rs3802228 correlated with 24-hour urine protein levels.

Conclusions:

  • CYP11B2 gene polymorphisms are significantly associated with the development and progression of eclampsia.
  • These genetic variations may influence eclampsia risk through effects on gene expression and clinical manifestations like hypertension and proteinuria.